Using NATS observability in a microservices architecture

So far, we have discussed microservice observability and NATS observability as two separate topics. Let's aggregate these topics and produce a common approach to implement observability for a microservices-based platform. The best way to learn a concept is to try with a practical example. Let's build a simple application that has two microservices written in Go. These microservices are called publisher and subscriber. We are going to use the open source observability tools Prometheus, Grafana, and Loki in this example.

The following figure shows the example application that we are going to build:

Figure 8.6 – Microservices observability example with Prometheus, Grafana, and Loki

The preceding figure depicts a simple application, consisting of a publisher microservice and a subscriber microservice interacting with each other using the NATS server. We have set up our monitoring ecosystem...